I don't see why not...I've only had one litter, but I put all of the 5-6 week old boys from the litter in with daddy while I was slowly feeding them off, and there were never any problems. I'd feel bad keeping him alone, too! I think they need company.

But then, that's just my opinion, and I am by NO means an expert. I'm just saying it worked fine for me, and I've heard of others doing that. If it's a big enough cage, I think you're fine.